Fraud user

fraud.rb

u = User.new(params)
if u.save
  # redirect
else
  # render form with errors
end


# task: Dodać sprawdzanie czy user jest fraudem.


user = User.new(params)
fraud?(user)           # user can be invalid
fraud?(user.email)     # email can be invalid
fraud?(params[:email]) # email can be invalid



user = User.new(params)
if user.valid?
  if fraud?(user.email)
    # render error
  else
    if user.save
      # redirect success
    else
      # render error
    end
  end
else
  # render error
end

Steps:
:validate_params
:check_fraud
:create_user